Convinced of a link between GFO and Cyano (and not the good kind)

[Myka]

Originally Posted by gregzz4

So, you're advocating using roughly 50mls of GFO in my 105 system, instead of the BRS recommended 225mls ?

Yes. I've had better results in the tank by using a lesser amount and changing more often.

I just looked at BRS, as I'm not familiar with their recommendations, and I see they want you to change it out every 4-8 weeks.

To compare my recommendation to BRS:

My recommendation is 1 tbsp (15 mL) per 30 gallons changed every 2-3 weeks. So my recommendation on 105 gallons works out to 140-210 mL in 8 weeks. I use RowaPhos strictly. I haven't used BRS HC GFO in several years.

BRS recommendation of 225 mL of the HC GFO changed every 4-8 weeks is 225 mL to 450 mL in 8 weeks.

There is almost no data available to compare the different brands of GFO, although I have found one comparing RowaPhos to PhosBan. http://www.theaquariumsolution.com/f...n%20report.pdf

Ultimately, my recommendation is based on using RowaPhos, and I am not sure if my recommendation can be directly compared.